package com.hy.ruiji.service.serviceImpl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hy.ruiji.common.Status;
import com.hy.ruiji.common.customException;
import com.hy.ruiji.enyity.*;
import com.hy.ruiji.mapper.OrdersMapper;
import com.hy.ruiji.service.*;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;
    /**
     * 用户下单
     * @param orders 下单提交的数据
     */
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获取用户id
        Long UserId = Status.getCurrentId();
        //查询当前用户购物车的信息
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,UserId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(wrapper);
        if(shoppingCartList==null|| shoppingCartList.isEmpty()){
            throw new customException("购物车为空，不能下单");
        }
        //查询用户数据
        User user = userService.getById(UserId);
        //查询地址信息
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook==null){
            throw new customException("地址信息有误，无法下单");
        }
        long orderId = IdWorker.getId();//订单号

        AtomicInteger amount = new AtomicInteger(0);
        List<OrderDetail> orderDetails = shoppingCartList.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(UserId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);

        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        //清空购物车数据
        shoppingCartService.remove(wrapper);
    }

    @Override
    public void orderAgain(Orders orders) {
        //获取用户id
        Long userId = Status.getCurrentId();
        //根据订单id查询订单明细表的数据，插入到购物车
        LambdaQueryWrapper<OrderDetail> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(orders.getId()!=null,OrderDetail::getOrderId,orders.getId());
        List<OrderDetail> list = orderDetailService.list(wrapper);
        list.forEach(item->{
            ShoppingCart shoppingCart = new ShoppingCart();
            shoppingCart.setUserId(userId);
            shoppingCart.setNumber(item.getNumber());
            shoppingCart.setDishId(item.getDishId());
            shoppingCart.setSetmealId(item.getSetmealId());
            shoppingCart.setAmount(item.getAmount());
            shoppingCart.setImage(item.getImage());
            shoppingCartService.save(shoppingCart);
        });

    }
}
